package com.heima.article.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.article.mapper.ApArticleMapper;
import com.heima.article.service.ApArticleService;
import com.heima.common.constants.ArticleConstants;
import com.heima.model.article.dtos.ArticleHomeDto;
import com.heima.model.article.pojos.ApArticle;
import com.heima.model.common.dtos.ResponseResult;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: ly
 * @Date: 2021/08/22/17:02
 * @Description:
 */
@Service
@Transactional
@Slf4j
public class ApArticleServiceImpl extends ServiceImpl<ApArticleMapper, ApArticle> implements ApArticleService {


    @Autowired
    private ApArticleMapper apArticleMapper;


    //单页加载的最大数字
    private final static short MAX_PAGE_SIZE = 50;


    /*
     *
     * 加载文章列表
     * type等于1 ：加载更多
     * type等于2 ：加载最新
     * */
    @Override
    public ResponseResult load(ArticleHomeDto dto, Short type) {

        //1.校验参数
        //类型参数检验（分页参数校验）
        Integer size = dto.getSize();
        if (size == null || size == 0) {
            size = 10;
            size = Math.min(size, MAX_PAGE_SIZE);
            dto.setSize(size);
        }

        //类型参数检验
        //type校验
        //如果type不等于1也不等于2，那么给它一个默认值1，加载更多。
        if (!type.equals(ArticleConstants.LOADTYPE_LOAD_MORE) && !type.equals(ArticleConstants.LOADTYPE_LOAD_NEW)) {
            type = ArticleConstants.LOADTYPE_LOAD_MORE;
        }


        //文章频道校验
        if (StringUtils.isEmpty(dto.getTag())) {
            dto.setTag(ArticleConstants.DEFAULT_TAG);
        }


        //时间校验
        if (dto.getMaxBehotTime() == null) dto.setMaxBehotTime(new Date());
        if (dto.getMinBehotTime() == null) dto.setMinBehotTime(new Date());


        //2.查询数据
        List<ApArticle> apArticles = apArticleMapper.loadArticleList(dto, type);

        //3.结果封装
        return ResponseResult.okResult(apArticles);
    }
}
